Machine for forming openings in piping



y 1931- w. L. ENGHAUSER MACHINE FOR FORMING OPENINGS IN PIPING FiledFeb. 20. 1929 5 Sheets-Sheet l lNVEINTOR 'A'i'TORNEYI July 7, 1931- w.L. ENGHAUSER MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20. 19295 Sheets-Sheet 2 wanna WM WM ATORNEYS July 7, 1931. w. L. ENGHAUSER1,313,152

MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20 1929 5 Sheets-SheetMW NHMWN 4 d n. n i \m mvvllllffirllllflfllllll v ii.

INVENTOR ATTORNEY July 7, 1931. w. 1.. ENGHAUSER MACHINE FOR FORMINGOPENINGS IN PIPING Filed Feb. 20, 1929 5 Sheets-Sheet 4 July 7, 1931. w.ENGHAUSER MACHINE FOR FORMING OPENINGS IN PIPING Filed Feb. 20. 1929 5Sheets-Sheet 5 \NVENTOR ATTORNEYj Patented July 7, 1931 UNITED STATESWINFORD L. ENGHAUSER, OF CINCINNATI, OHIO MAGHINE FOR FORMING OPENINGSIN PIPING Application filed February 20, 1929. Serial No. 841,467.

This invention relates to an improved method of forming apertures or taholes in manifolds for gas stoves and the li e, and to a machine forsupporting the pipe and performing the steps of the method at aplurality of points on a manifold, as wel as performing the steps of themethod simultaneously on manifolds progressing through the machine.

In the formation of these manifolds, standard gas pipe is used which hasa relatively thin wall, and fittings are screw-threaded into the wallsof the pipe. The connections of the fittings to the manifold must begas-tight, and for this reason it is desirable to have the openingsthrough the wall of considerable length for greater bearing andincreased threading. The normal thickness of the wall of the piping isinsuflicient for the formation of the necessary number of threads for apositively rigid connection of the nipple and a gas-tight joint.

It is, therefore, an ob'ect of this invention to provide a method oforming the tap holes a of increased dimension over the normal wallthickness for increased hearing or number of threads.

The tap holes of this invention are formed by means ofa spinning toolwhich is inserted through the wall of the piping, and immediaiely uponcontact therewith heats the met- :11 to a. high heat and spins the samepartly toward the interior and partly toward the exterior of themanifold. The wall of the piping is not depressed by this method and asmooth integral sleeve-like portion or inwardly and outwardly bossedopening is provided, the rotating tool being reciprocated into the workafter the manner of a drill, with sufficient speed to prevent any damageto the tool due to the heat.

In using this method it has been found de sirable to initially drill thewall of the manifold prior to insertion of the spinning tool,

r this aiding in the centering of the tool and lessening the possibilityof damage to the tool due to the length of the operation, it also beingfound that, with the hole drilled of a sufficient diameter to leaveenough metal to be forced outwardly by the spinning tool,

flanges or bosses of the properlength and thickness may be formed. Theinitial drillmg may or may not be performed, depending upon the hardnessof the pipe and the form of aperture desired.

This invention therefore provides an improved method of forming tapholes in manifolds, consisting of traversing the wall of the piping witha spinning tool rotating at high speed, heati g the wall of the pipingdue to the friction and because of the resultant softened state of-themetal, permitting the metal to be spun and formed into a sleevelikeportion of considerable length, and as an additional step in the method,to initially drill the Wall of the piping to provide a spinning toolcentering opening, and means for governing the amount of metal formed inthe flanges for the bosses. It is furthermore provided that the ends ofthe bosses are approximately squared, this resulting because the spiningaction displaces more metal on the transverse exterior edges than on thelpingitudinal, and vice versa on the interior e es.

nother object of this invention is to pro- Vide a machine for performingthe steps of the method herein outlined, which machine is contrallableto drill a given manifold at predetermined points along the length ofsaid manifold, and which, without removal of the manifold from themachine, permits the same to be subjected to the action of areciprocating spinning tool, the spinning tool acting upon the manifoldat the same points as the drill and controlled by the same means, and tofurther provide that the drilling operations may be performed on onemanifold as the spinning operations are being performed on anothermanifold, these manifolds as they are clamped in the machine beingsuccessively moved from position for operation thereon by the drill to acorresponding position relative to the spinning too-1 and a blankmanifold inserted each time in the drilling side of the machine.

Another object relates to the construction of the work support forreceiving the manifolds and to its mounting for reciprocation relativeto the opposing tools, and for rotation to present a drilled manifold tothe spining position, this view also illustrating the clutch mechanismfor imparting a single revolution to the cams and single reciprocationsto the slides.

Figure 5 is a sectional View taken on line 5, Figure 2, illustrating thespinning tool spindle and slide, showing the spinning tool traversingthe pipe wall, and the cam means for actuating the same.

Figure 6 is a fragmentary sectional view taken longitudinally of thetool' support and its slide block, illustrating the work support movedto the limit of inward movement, and illustrating the latch means forlocking the work support against rotation.

Figure 7 is a sectional view taken on line 7-7, Figure 6, butillustrating the work support retracted to the fullest extent, andshowing the means for locking the same against rotation withdrawn justprior to upsetting the work support.

Figure 8 is a side elevation of an extension element of the work supportfor handling longer manifolds.

Figure 9 is a sectional view taken longitudinally and horizontally ofone of the arms of the work support, illustrating the extension pieceand an abutment plate thereon for operating the worl; support latch.

Figure 10 is a perspective view of the abut ment plate.

Figure 11 is a sectional view taken on line Ill-1l, Figure 2,illustrating the clutch tripping and cycle controlling mechanism.

Figure 12 is a longitudinal section of a manifold having openings ortaps formed therein by means of the method and machine of the presentinvention.

Figure 13 is an enlarged sectional view taken on line 1313, Figure 12,detailing the opening or tap.

Figure 14 is a sectional view taken similar to Figure 13, but showingthe hole tapped.

machine of the present invention, in general, comprises, a pair ofslides each having a spindle mounted therein, the spindles of each slidebeing independently driven, one thereof carrying a drill. and the othera spinning tool, and the tools opposing. A work support is slidably androtatably mounted for sliding movement transversely between the tools,and rotatable to perform successive operations on a pair of manifoldsmounted therein at opposite sides by relating :1 respective manifoldfirst to the drill and then to the spinning tool, the purpose asherebefore described being to produce by an improved machine and methoda series of inwardly and outwardly bosscd apertures or trap holes in themanifold. The respective tool carrying slides are brought toward eachother si multaneously by means of a clutch controlled cam shaft.

The tools, therefore, act simultaneously to drill one manifold and tospin the opening in the advanced or upset manifold. A templet bar isprovided for cooperation with a lever on the work support to control thesliding thereof and to uniformly space the apertures in each manifoldand to accurately align the same for the spinning operation.

Referring to the drawings and describing the machine in detail, thepedestal or frame thereof is indicated at 15. A pair of parallel spacedlongitudinally disposed angle iron pieces 16 form the table support forthe machine, and the table thereof is formed of a heavy plate 17disposed within an oil pan 18 of greater area than the plate, providingan oil trough around the plate, the table thus formed being secured tothe angle iron frame pieces by means of screws.

A. cam carrying shaft 19 is mounted on the angle iron pieceslongitudinally of the machine in bearings 20, one on each end of theangle iron pieces. Adjacent the inner side of each bearing 20, a cam 21is secured to the shaft, these cams facing inwardly and actuating thedrill carrying slide 22 and the spinning tool carrying slide The slidesare mounted in slide blocks 2 lsocured on the plate toward therespective ends there 5'. The shaft 19 passes loosely through the blocksand is maintained against longitudinal displacement in its bearings bymeans of a "J of collars 25 at one end of the shaft, disposed one ateach side of a bearing.

A drive shaft 26 for rotating the cam carrying shaft 19 is mountedtransversely to and below the cam shaft at one end of the machine, beingjournalled in the downwardly extending flanges of the angle ironelements of the frame. This transverse power shaft has a pulley 27secured on its outer end driven by means of a belt 28, and has a worm 29Se cured thereon between the flanges of the angle iron pieces, this wormbeing in mesh with a worm wheel 30 loosely mounted on the cam shaftbetween the cam 21 and the bearing 20 of the shaft.

The worm wheel is drivingly connected to the cam shaft by means of atoothed clutch sleeve 31 slidably and non-rotatively mounted on saidshaft between the cam and the toothed hub of the worm wheel. The clutchelement is splined to the shaft for a positive rotative connectiontherewith and longitudinal clutching movement thereon. Gompressionsprings 34 are provided between the cam and the clutch sleeve, thesesprings seating in recesses 35 is the respective faces between whichthey are disposed.v

As shown in Figure 11, a control device is provided for maintaining thespring actuated clutch sleeve normally out of engagement with the wormwheel. This device comprises a bar 36 mounted transversely of the shaft,

being pivotally connected on one of the angle 1ron pieces and heldupwardly against a U- shaped stop 38 on the other angle iron by means ofa weight 39 hung on the end of a cable 40 attached to the swinging endof the-bar and disposed over a pulley 41 hung from the ceiling. Theweight normally holds the pivoted bar in its limit of upward movement,and in this position a roller 42 mounted on the upper face of the bar isin engagement with a cam segment 43 secured to the periphery of theclutch sleeve toward the cam.

The pivoted bar is drawn out of engagement with the cam segment by meansof a treadle 44 connected to the outer end of the bar by a rod 45.Depression of the treadle releases the clutch sleeve and allows thecompression springs to move the clutch collar into engagement with theworm wheel where-' by the cam shaft is driven. The operator causes afull revolution of the shaft to take place by merely tripping thetreadle, allowing the control bar to be drawn back into upper position,whereupon the inclined surface of the cam segment engages the roller,and the clutch collar is withdrawn from the worm wheel and the power cutoff at the same point of roller engagement on the cam at which it wasthrown in. This cycle of movement imparts reciprocation simultaneouslyto p the tool slides.

The drill spindle 46 and slide 22, and the spinning tool spindle 47 andslide 23 are similar in construction and will only be describedindependently with respect to their differences The slides 22, 23, arecast in U form with the arms of the U extending upw'ardly and therespective spindles 46, 47, mounted between and in the arms. The spindles are independently driven by means of pulleys 48 secured to thespindles between the arms of the slide and are each maintained againstlongitudinal displacement by means of plates 49 secured to each end faceof the slide and against the ends of the Spindle.

Each spindle has a chuck 50 mounted on a stud extension thereof, thisextension protruding through a respective retaining plate 49. The chuckis secured on the extension by means of a set screw 51, and the drill 46or spinning tool 47 a is maintained in the chuck by means of a'pair ofset screws 5252. The intermediate portion of the drill is supported in abracket 46 passing through a hardened bushing therein and the bracketsecured to the work support slide block.

The operative connection between each slide and its respective cam is ofthe following nature: A yoke-headed screw 53 is screwed into the outerend face of the slide, the yoke end'carrying a roller 54 in engagementwith the cam face, and the screw maintained in set position by means ofa lock nut 55. The

by means of coiled tension springs 56 attached to clips 57 secured tothe inner end wall of the slide and secured to a respective slide blocksection 58, there being a spring at each side of each slide.

A work slide block 59 having its slide faces disposed transversely tothe tools is secured to the plate of the table. The work support 60 isof U-sha-pe and the arms thereof straddle the slide block 59 and aredisposed .vithin respective slide bearing grooves 61 at each sidethereof. The work support is additionally slidably mounted on a rod 62secured within the end face of the slide block atone end, and mounted ona standard 63 at the other end. The work support 60 is designed to carrya pair of manifolds shown at 64, one on each side face thereof, and isrotatable for subjecting the respective manifolds to suecessive drillingand spinning operations from alternate sides without removal from thesuport.

The manifolds 64 are clamped between wedgebars 65 longitudinally of thework support, the wedge bars being disposed within longitudinal grooves66 in the side faces of the support. The wedge bars are designed toforce the manifold inwardly against the base of the grooves, the lowerof the bars being secured in definite position in the groove, and theupper floating.

The upper bar isnormally held against the upperwall of the groove so asto present an open jaw for the speedy reception of a manifold. This isaccomplished by means of screws 67 screwed into the wedge bar andpassing loosely through the support with compression springs 68 disposedbetween the screw heads and the top of the support. This movable bar isclamped against the work by means of a Wing-headed screw 69 screwed intothe support and bearing against the top surface of the bar.

The manifold in this instance as presented to the machine has an elbow 7O at one end, and this elbow is the means for longitudinally setting themanifolds in the support.

As illustrated in Figures 1 and 2, the

grooves in the side of the support are provided with shoulders 71 towardthe outer ends thereof, and the inner edges of the elbows abut theseshoulders. When there is no elbow on the piping a stop (not shown) isused to longitudinally set the same. 5y means of this clan'ipingarrangement and relation of the work support, each manifold is movedtransversely of the end of the drill and securely held during thedrilling operation.

A series of apertures 72 is formed in each manifold (see Figure 12), themanifolds being successively fed into the machine, and

a manually controlled feed arrangement for locating these apertures isprovided of the following nature: A templet bar 73 is mounted parallelwith the work support in about the same plane as the manifold, this barbeing bolted to the upstanding arms of a bracket 74 secured to thetable. The upper edge of the templet is notched at intervals as at 75,the spacing of the notching c-orresymnding to the desired spacing of thetap holes in the manifold.

The outer end of the work support 60 has a hub 76 extending therefrom,and a collar 7 7 is loosely rotatably mounted on the hub and maintainedagainst outward displacement therefrom by means of a disk or washer 78secured to the end face of the hub and engaging in a concentric groovein the outer face of the collar. A handle 79 is bolted to the outer faceof the collar and lies across the face of the washer to prevent inwarddisplacement of the washer. This handle is adapted to extendhorizontally and to rest on the templet bar for engagement in any one ofthe series of grooves, the rear edge of the grooves being inclined andthe forward edge sharp so as to provide a positive abutment of thehandle when dropped into the groove on inward movement of the worksupport and to permit the handle to slide easily out of the groove onreverse movement of the work support. A right angled extension 80 isprovided on the handle as a secondary handle hold for the operator.

A support bar 80 is mounted on the opposite side of the rod 62 parallelwith and on the same plane as the templet, being secured at one end to abracket on the table and atthe other on a standard 80". This bar is forthe purpose of supporting the handles 79, 80, when thrown back from thetcmplet.

It is provided that during all drilling and spinning operations the worksupport is in sliding engagement with its slide block. However, when allthe apertures have been drilled in a given manifold, the work support isupset and the drilled holes are presented to the spinning tool forbossing the same. This rotation of the work support is accomplished bywithdrawing the support entirely 'from engagement with the slide blockand rotating it'on the support rod 62.

A means for limiting the outward movement of the work support and forpositivel rotatively positioning the same to place the manifolds in aplane with the tools is fully disclosed in Figures 6 and 7. As shown inFigure 6, inward movement of the work support is limited by means of acollar 81 pinned to the support rod. As shown in Figure 7. this samecollar limits outward movement of the work support and provides for ayieldable contact of the support therewith. The support rod is securedto the slide block by means of an elongated set screw 82, and theabutment collar is therefore in definite relation to the slide block.

A latch 83 is slidably mounted on the support rod between the collar andthe end face of the slide block, this plate having a sleeve or hubextension 84 disposed within a large bore in the face of the block andprovides a pair of apertures 85 traversed by studs 85 having roundedends extending from the end face of the block. A spring 86 is providedsurrounding the support rod between this plate and the collar fornormally holding the plate in engagement over the screws. The plate isof the same width as the space between arms of the support, and thesupport is therefore attached thereto for rotation.

As a means for withdrawing the plate from engagement with the pins orscrews extending from the slide, abutment plates 87 are secured to theextreme ends of the side faces of the work support, there being lugs 88extending inwardly from these plates engaging in grooves 89 in the rearface of the plate. These grooves or recesses engage the laterallydisposed edges of the lugs so that as the work support is slid outwardlyon the rod the lugs engage the plate and draw it outwardly, compressingthe spring and relieving the shock when the support is drawn backsuddenly.

l Vhen the plate has been withdrawn from the pins, the work support isfree to rotate, whereupon the positions of the respective apertures ofthe plate are reversed as to top and bottom. Another manifold isinserted in the drill side of the support and the drilling and spinningoperations are performed sin'iultaneously on the respective manifoldsand at corresponding points.

As a. further means for stabilizing the work support, the lugs of theplate attached thereto engage in longitudinal grooves 90 formed in theslide grooves of the work support slide block. The work support is madeextensible by means of sections 91 attachable to its outer ends as shownin Figures 8 and 9.

An oil pump is provided for supplying oil to the drill at the point ofthe drilling operation. This pump is driven by means of a belt 92extending between a pulley 93 on the main lid drive shaft and a pulley94 mounted on the shaft of the pump 95, the pump secured on a bracket 96attached to the pedestal of the frame. The intake pipe 97 the pump ex-:ends down into an oil reservoir or tank 98 on the floor, and thedischarge pipe 99 of the pump extends upwardly and is secured to v thetable,with the nozzle end thereof immediately above the drill. The oilwhich is sprayed over the drill drains into thetank forming a part ofthe table and is conveyed back to the reservoir by gravity through areturn pipe 100.

The operation of the machine and the method of forming tap openin s in amanifold will be apparent from the foregoing description. A manifold isinitially placed in the drill side of the work support and is securedtherein by means of the previously de cribed clamp. The operator havingplaced the desired templet on the bracket to govern the spacing andlocation of the taps, proceeds to manually move the work support slidethrough the successive notches of the templet, .ripping the clutch uponpositioning the control lever in each notch, whereupon the drill spindleis reciprocated in single cycle movements of the cam shaft, and drilledholes are formed at the required intervals.

The work support is then withdrawn completely from engagement with itsslide block and the latching means 83 is operated to release the worksupport, and it is thereupon rotated or upset to dispose the drillmanifold 20 the spinning side of the machine, being thereupon latched byreleasing the same, allowing the latch element 83 to engage the studs 85in reverse position. The operator hen places another manifold in thedrill side f the machine,- the machine then being properly primed andsimultaneous spinning and drilling operations are performed upon therespective manifolds.

Inasmuch as the manifolds are secured in :orresponding positions in theWork support exactly opposite, the same control for spacing the drillholes is used for positioning the manifold for the spinning operations,and the tripping of the clutch causes both the drilling tool and thespinning tool to act on the respective pieces of Work.

As disclosed in Figures 4 and 5, the spinning tool has a rounded end 102formed thereon and the tool is the diameter of the tap opening desired.The rounded end 102 of the spinning tool aids in the centering of thetool as it engages the drilled hole. It also permits the back spinningof the metal in the formation of an outer flange. There is .lisplacementof moremetal along the transverse edges of the opening on the exteriorof the pipe than on the longitudinal edges, while the opposite is trueonthe interior of the pipe. This is due to the curvature of the pipe onthese respective sides. The result threaded (see Figure 14) and aconsiderable is that the ends of the sleeves are approximately squared,this being of advantage in starting the threading.

The spinning tool eing rotated at a high rate of speed, the engagementthereof with the wall of a drill hole causes the metal to heat uprapidly, and the metal is easily spun or spread along the tool into theform of the bosses herein described. The approach of the spinning toolup to the manifold is very rapid due to the shape of its operating cambut the speed. of traverse is slower to permit the metal to heat up. Thetool is of highly hardened steel and is withdrawn from the heatedportion of the manifold before it can be damaged or stick therein. p

As shown'in Figure 5, the spinning tool traverses the wall and forms astraight opening having sleeve-like characteristics and of exceedinglygreater length than the normal 35 wall thickness of the manifold piping.After the manifolds are taken from the machine (see Figure the tapopenings are screwthread bearing is provided.

Having described my invention, I claim:

, 1. A machine of the class described, comprising, a pair ofreciprocable spindles, means for rotating said spindles, means forsimultaneously reciprocating said spindles, a drill and a spinning toolmounted in the respective opposing ends of the spindles, a work supportmounted for sliding movement between and transverse to said tools andaxially supported for rotative movement, and 1 means for securing thework in the respectively opposite sides of said support for simultaneousdrilling and spinning operations on the oppositely disposed pieces ofwork.

2. A machine of the class described, com- 105 prising, a pair ofreciprocably mounted spindles, means for rotating said spindles, toolsmounted in the respective opposing ends of said spindles, means forsimultaneously reciprocating said spindles toward each other, a worksupport slidably mounted transverse to and. between said tools,means forsecuring pieces of workin the opposite sides of the support, a templetbar disposed relative to said slidable work support, and a laterallyextending control lever on said work support for stop engagement withsaid templetto definitely and successively present points of the work tothe tools.

3. A machine of the class described, comprising, a reciprocably mountedspindle, means for rotating said spindle, a tool mounted in saidspindle, a work support slidably mounted transverse to said tool, astationary temp-let bar disposedlongitudinally relative 12 to saidslidable work support, and a laterallyextending swinging control leveron said work support for stop engagement with said templet to definitelyand successively present points of the'work to the tool.

4. A machine of the class described, com prising, a spindle mounted forreciprocation, means for rotating said spindle, a tool secured in saidspindle, a slide block transrersely mounted relative to said tools, awork support disposed for sliding engagement in said block, anaxialmounting for said support extending from one end of the block, a atchingmeans between said slide and block for aligning and securing said worksupport on its axis relative to said slide, and means for mounting awork piece in the side face of said work support adjacent said tool.

5. A machine of the class described, com- )rising, a pair of spindlesmounted for reciprocation, means for rotating said spindle, toolssecured in the respective opposing ends of said spindles, means forsimultaneously eciprocating the spindles toward each other, L slideblock transversely mounted between said tools, a work support disposedfor sliding engagement in said block, an axial mounting for said worksupport extending from one end of the block, a latching means between:aid slide and block for securing said work support in alignment to saidslide, and means for mounting work pieces in the respective side facesof said work support whereby simultaneous tool operations may beperformed on these work pieces and the work support rotated to reversethe positions of the work pieces relative to the tools upon retractionfrom engagement with said block or progressive operations on the work.

6. In a device of the class described, a pair of spindles mounted forreciprocation toward each other, means for rotating said spindles,

tools mounted in the opposing ends of said pindles, means forsimultaneously recipro- 'ating said spindles, a slide block mountedtransverse to and between said opposing spindles, a support rodextending from one end of said slide block, a work support xiallymounted on said rod and alignable .vith said slide block, a latchbetween said Work support and said slide block, said latch unlatched bydisengagement of said work support from said slide block for permitting"otation of the work support, and means for mounting respective piecesof work in the opposing sides of said work support, said latch having alatching connection with said slide block for aligning said work supportiherewith.

7. A machine of the class described, comprising, a pair of reciprocablymounted spindles, means for driving said spindles, means forsimultaneously reciprocating the zpindles of the pair toward each other,tools mounted in the respectively opposing ends of the spindles, a worksupport mounted for sliding and axial movement between and transverse tosaid tools, and means for securing the work in the respectively oppositesides of said support for simultaneous operations on the oppositelydisposed pieces of work.

8. A machine of the class described, comprising, a reciprocably mountedspindle, means for rotating said spindle, a tool mounted in saidspindle, awork support slidably mounted transverse to said tool, astationary templet bar mounted relative to said slidable work support,and a lever on said work support disposed to definitely enga e thetemplet bar at successive points for lociing the work support insuccessive positions relative to the tool.

9. In a device of the class described, spindles mounted forreciprocation toward each other, means for rotating said spindles, toolsmounted in the opposing ends of said spindles, means for simultaneouslyreciprocating said spindles, a slide support extending transverselybetween-the tools, a work support rotatably and slidably mounted on saidslide support, latch means between said work support and said slidesupport for maintaining the work support against rotative movement, andmeans for mounting respective pieces of work in the opposing sides ofsaid work support.

10. In a machine of the class described, spindles mounted forreciprocation toward each other, means for rotating said spindles, toolsmounted in the opposing ends of said spindles, means for reciprocatingsaid spindles, a work support disposed transversely between the tools,said work support slidably and rotatably mounted, a stationary templetbanadjacent said work support, a lever rotatably mounted on the axis ofrotation of the work support and adapted to engage the templet bar, andmeans on the templet bar for stopping the lever at various selectivepositions for fixing the work sup, port in definite successive relationsto the tools.

In witness whereof, I hereunto subscribe my name.

WINFORD L. ENGHAUSER.

